2021-2022英语周报高一新课程第47答案

Dear studentsI believe all of you have watched the excellentperformance of the Chinese athletes in the OlympicGames. And I'm sure you were also excited when theChinese national red flag rose into the sky. Then did youfeel inspired to participate in more sports activities? Didyou make up your minds to spread the spirit of theOlympic Games? In fact, I did feel encouraged. As we allknow, sports can not only build up our bodies but also ourcharacters. So l hope all of us can do more sports ratherthan just sit there cheering. By playing sports, we aredoing our part to contribute to our countryNow, let's go out to play our favorite sports!

33.(1)ABD解析:当分子力表现为斥力时,分子力和分子势能均随分子间距离的减小而增大,故A正确;单晶体具有各向异性,是因为其点阵结构中各个方向上微粒个数不均等故B正确;气体分子的平均动能越大,则温度越高,但是因为不知体积的变化,则其压强的变化无法确定,选项C错误;能量耗散是从能量转化的角度反映出自然界中【2021金卷·理综参考答案第3页】金卷A的宏观过程具有方向性,故D正确;绝热气缸中密封的理想气体在被压缩过程中,内能增大,温度升高,气体分子运动剧烈程度增大,故E错误(2)解:①开始时,封闭气体的压强大小为p1=75cmHg-15cmHg=60cmHg(1分)当左液面比右液面高出25cm时,封闭气体的压强大小为P2=75cmHg-25cmHg=50cmHg(1分)气体发生等温变化,则户L1S=p2L2S(1分)解得L2=18cm(1分)解得L2=18cm(1分)则L'=L2-L1=3cm左液面下降3cm.(1分)②若不打开阀门,从开口处往玻璃管中缓慢倒入水银,当左、右液面相平时,封闭气体的压强p2=75cmHg(1分)此过程气体发生等温变化,则pL1S=pL3S(2分)解得L3=12cm(1分)则倒入的水银柱的长为L=15cm+3cm+3cm=21cm(1分)

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